... 3. Protects the surfaces not to be polluted, corrode, and scratch Specifications: 1. Thickness: 20 to 150 microns ( ... 4. Paper core diameter: 1,2,3inches 5. Available colors: clear, blue, white, and black and white 6. External: LDPE film 7. ... Adhesive strength: 20-1200g/cm 8. Adhesive type: solvent/water base acrylic and rubber ldpe protective film